Water-seal trap.



'No. 839,165. PATENTED DEG.25,1 90:6.

' J. T. LUND.

WATER SEAL TRAP.

AYPLIUATION FILED OCT-16 1906.

' noewtot I anon mg tended to perform, I-.-will proceed to describe sad awin s, body e -eithe.trap,-wh1ch isusually composed JoHN'Triausn; or nerves; n

3'0: all whom it may concern:

hen of the United States, residing in the city and county of Denver and State of Colorado,-

5- have invented certain new and useful Improvements inWater-Seal Traps; and Ido declare the following to be a full, clear, and ex A act description of. the invention, such as will enable others skilled in the art to which io it appertains to make and use the same, reference' being hadlto the accompanying draw-1 ings, and to the characters of reference marked thereon, which form .a part of this specification. :5 My invention relates. to improvements in water-seal traps .orother' structures provided with ascrew-cap or closure where it is desirable to form a tight joint without the aid lot 11 dent the same sufficiently to form a sealed joint, whereby. the contents of the -trap-'areprevented from gaining access to the interior threads of the cap-flange. or theexterior 00-- operating threads of the ring. I Having briefly outlined my improved construction, as well as the function it is inthe same in detail reference being made to the. accompanying drawings, in-which is illustrated an embodiment thereof. v

In the drawings, Figure 1 is a section taken through the upper part of a drunitrap equipped with my improvements. Fig. 2 isa fragmentary view showin the cap or closure detached from the trap. of a drum-trap shown on a smaller scale than in Fig. 1. Fig. 4 isanordinary Stra -,;to

1 which my improvement may be app ied.

Fig. 5. is a fra mentor detail view illustrating a niodifie form 0 construction. Fig.1; is a detail view illustrating stillanother form of construction. a The, same ref rcnee characters indicate the I same, artsin a l the views. Re erring firstto Figs. 1, 2, and 3 of the et-the numeral 5 designate the cap-is screwed mto' the closed osition. This in place.

ig. 3 is an elevation into the roove and allowed to cool, as may I flpecmcation oflnttsnl'atcitl APplldltlQfi sarcoma-masts: seen Rm282,8 86.

of lead. Thia-body portien of the trap is of :"ordmary" construction. A3 shown in thedrawings, it is rovided with the usual inlet 31 7, an vent-pipe 8'. To the top of the body of the tra' '5. is applied a rim 9,

- preferably compose of brass. This ring "a shoulder 10, resting upon "the u r of the heady of the trap. The ring lilfs pendm part 12, extending below the shoulder an engaging the body of the trap on the inside. This ring also hasan u wardly-pro-. ec'tjngpart 1 3, exteriorly threaded-as shown, at 14, to engage the interior threads of the outer flange 15 of the cap or closure. 16. The 7o top of the ring part '13 isbeveled to form a knife-e'dge 13? which enga esa ackin -rin i or washer l'ifPrefcrabI g p Elsa I composed 0 run into a groove forme betweenv the fit:

15 and a short flange 18, formed on the ca The ring 9 may be secured to the body of t e tra by solder'1'9. e I

n the form of construction shown in 5 the soft-metal packing-washer is inserted in a groove formed infthe ring 9, the said Washer or packin being designated 9". In

thisz-view a depen ing flange I6- is formed on the cap, the said flange havinga sharp ed e.

adapted to'engage thewasher 9 when t econstruction gives substantial y the same re sult as that obtained by the form shownin the other views. l manuiacturing .the cap 6 a ring of soft metal may be pressed intoatheu groove between the flanges 15 and 18', or the metalin liquid form may be run into the groove andallowed to harden. In an event the softmetal ring or washer should -be held securely The cap is then screwed down, 'causin theknife-edge of one part to indent. the so t-metal ring or washer of the other-I1 part. soft-metal washer as shown in Fig. 5, the:v

same may be applied to therin in'the same we i manner as above explained w en s eaking of the cap-that-is to sa themeta ring or washer already ferme ma be pressed tightly'inte'the circu'mferentia groove of the ring, or the metal in liquid form may be'run be desire It must be understood, however,

that I do not limit the invention to anyis' cial manner it-applying the soft-metal ring or washer, since it may.- be applied in any suitable manner. j 4 Attention is called to the fact that my If the ring 9 late be provided with ainto the top cured by t proved construction may be used in relations other than those heretofore explained. In other words, the edged part on one device engaging a soft-metal part on another de vice and means for bringing the two devices together in operative relation is believed to be novel. I

The part 12 of the ring 9- may be sweated of the body of the trap or see use of solder, as may be desired. The application of the solder 19 is not absolutely necessary, but may be employed to give the plumber an opportunity to wipe the joint.

The construction shown in Fig. 4 is substantially the same in all essential features as that shown in the other views, the only difference being that the depending part 5* ol' the S-trap B takes the place of the body 5 of the trap in the other views.

It may be stated that in my improved construction it is comparatively easy to unscrew the cap, because there is but little friction between the edged part andthe soft- =metal part, due to the fact that the surface engagement of the two parts is very slight.

In Fig. 6 I have shown the ring Qwith two separated edges (designated 9.) It may, un-

der some circumstances, be advisable to pro vide the edgedimember with two edges, as Sl10WT1 -'l[l this view. In thls event both edges would engage the soft-metal rin or washer 17. This would give additiona security against the possible leakage of gas or surrounding the opening in the latter, the

ring also having parts extending beyond the collar in both directions, one part entering the body of the trap while the other part projects beyond the same and is cxteriorly' threaded and provided with a knife-edge at its free extremity, and a cap having nner and outer concentric flanges, the outer flange being interiorly threaded to 006 erate with the exterior threads formed on t e ring, the

cap being provided with a packing of soft metal'run into the groove between the concentric flanges, the said acking being adapted to engage the knife-ec ge of the ring for the purpose set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN T. LUND.

A. J. OBRIEN. 

